--- a/scripts/plot/barh.m
+++ b/scripts/plot/barh.m
@@ -27,7 +27,8 @@
 ## If @var{y} is a matrix, then each column of @var{y} is taken to be a
 ## separate bar graph plotted on the same graph. By default the columns
 ## are plotted side-by-side. This behavior can be changed by the @var{style}
-## argument, which can take the values 'group' (the default), or 'stack'.
+## argument, which can take the values @code{"grouped"} (the default),
+## or @code{"stacked"}.
 ##
 ## If two output arguments are specified, the data are generated but
 ## not plotted.  For example,